I've never been to the Maker Faire, but it sounds like fun and right up a Geeks alley:
About Maker Faire Kansas City:
Maker Faire: Kansas City celebrates things people create themselves — from new technology and electronic gizmos to urban farming and “slow-made” foods to homemade clothes, quilts and sculptures. This family-friendly event demonstrates what and how people are inventing, making and creating. It brings together Makers, Crafters, Inventors, Hackers, Scientists and Artists for a faire full of fun and inspiration. Come see what others are making and be inspired to tap into your own creativity!
Tickets are only $12 for adults, one day and $19.50 for two days.
Youth and military are only $9. You can purchase your tickets here: http://www.makerfairekc.com/tickets/